Wiring Light switch: How to Control a Lamp by a Single Way or One-way Switch?

Wiring Light switch: How to Control a Lamp by a Single Way or One-way Switch?

This is the most basic circuit of Wiring Light switch, by which we can control a lamp by single way or one way switch.Key Point: Switch is always (only and only) connected on Line Or Live Or Phase. Not on Neutral wire.